/*Code borrowed from https://www.w3schools.com/css/css3_images_modal.asp My changes marked with comment*/
* {
    box-sizing: border-box;
}

h1 {
    text-align: center;
    padding: 10px;
}

.gallery {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    padding: 0 15px;
}

.gallery-item {
    position: relative;
    width: calc(25% - 20px);
    height: auto;
    margin: 10px;
    cursor: pointer;
    transition: transform 0.5s ease;
    /* My addition so gallery images wouldn't stretch.  - Arron*/
    align-self: center;
}

    .gallery-item:hover {
        transform: scale(1.1);
    }

/* The Modal (background) */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease;
}

/* Modal content (image) */
.modal-content {
    position: relative;
    width: 90%;
    height: auto;
    max-width: 90%;
    max-height: 90%;
    border-radius: 5px;
    overflow: hidden;
    animation: zoomIn 0.5s;
    /* My addition so images in modal wouldn't stretch.  - Arron*/
    object-fit: contain;
}

@keyframes zoomIn {
    from {
        transform: scale(0.6);
    }

    to {
        transform: scale(1);
    }
}

.modal.show {
    display: flex;
    opacity: 1;
}

/* Close button */
.close {
    position: absolute;
    top: 10px;
    right: 15px;
    color: #ffffff;
    font-size: 35px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.3s;
}

/* Caption of modal image */
.caption {
    position: absolute;
    bottom: 15px;
    width: 100%;
    text-align: center;
    color: #ffffff;
    font-size: 24px;
}

@media screen and (max-width: 768px) {
    .gallery-item {
        width: calc(50% - 20px);
    }
}

@media screen and (max-width: 480px) {
    .gallery-item {
        width: calc(100% - 20px);
    }
}